WO2007057254A1 - Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor - Google Patents
Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor Download PDFInfo
- Publication number
- WO2007057254A1 WO2007057254A1 PCT/EP2006/067170 EP2006067170W WO2007057254A1 WO 2007057254 A1 WO2007057254 A1 WO 2007057254A1 EP 2006067170 W EP2006067170 W EP 2006067170W WO 2007057254 A1 WO2007057254 A1 WO 2007057254A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- intermediate plate
- valve body
- pressure passage
- nozzle body
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
Definitions
- the invention relates to an intermediate plate for a fuel injector according to the preamble of claim 1.
- the invention further relates to a fuel injector according to the preamble of claim 8.
- the object of the invention is to improve the injection behavior of a fuel injector equipped with an intermediate plate according to the preamble of claim 1 according to the preamble of claim 8, in particular in the case of a multiple injection of small injection quantities.
- the object is at an intermediate plate for a fuel injector having a high-pressure passage hole, which connects a high pressure passage, which is provided in a valve body and communicates with a high-pressure fuel storage, in communication with a high-pressure chamber, which is provided in a nozzle body, wherein the intermediate plate between the Valve body and the nozzle body arranged is achieved in that the high-pressure passage hole has a cross-sectional shape, through which the flow through the high-pressure passage hole from the valve body to the nozzle body improves and worsened in the opposite direction from the nozzle body to the valve body.
- one cause of instabilities in multiple injections are pressure oscillations in the injector.
- the high-pressure through-hole does not have a constant cross section but a cross-sectional profile, by means of which the undesired pressure oscillations are damped.
- a preferred embodiment of the intermediate plate is characterized in that the pressure passage hole at its end facing the valve body has a larger diameter than at its end facing the nozzle body.
- the high-pressure passage hole in the intermediate plate which is also referred to as a valve plate, is used according to the invention as a damping element.
- the high-pressure passage hole is preferably a bore which is designed to hinder the propagation of the vacuum wave when the needle is closed and to improve afterflow. As a result, direction-dependent currents are tion coefficients created by the damping behavior can be optimally adjusted.
- the intermediate plate is characterized in that the high-pressure passage hole is conical.
- the damping properties of the high-pressure through-hole can be adjusted specifically. It is important to match the cone angle with the length of the high-pressure through-hole.
- a further preferred embodiment of the intermediate plate is characterized in that the high-pressure passage hole has a cylinder depression at its end facing the valve body.
- the intermediate plate is characterized in that the high-pressure passage hole has a chamfer or a radius at its end facing the valve body. As a result, the flow coefficient in the inflow direction is maximized.
- Another preferred embodiment of the intermediate plate is characterized in that the high-pressure passage hole has a sharp edge at its end facing the nozzle body. As a result, the flow coefficient in the outflow direction is minimized. - A -
- the intermediate plate is characterized in that the intermediate plate is formed in one piece.
- the intermediate plate can also be designed in several parts and comprise a plurality of intermediate plate elements having a common high-pressure through hole.
- a fuel injector having a valve body having a high-pressure passage communicating with a high-pressure fuel accumulator and having a nozzle body having a high-pressure space
- the above object is achieved in that a previously described intermediate plate between the valve body and the Nozzle body is arranged.
- FIG. 1 shows a partial view of a conventional fuel injector in longitudinal section
- Figure 2 shows a partial view through an injector in longitudinal section with an intermediate plate according to a first embodiment
- Figure 3 shows an intermediate plate according to a second embodiment in section and Figure 4 shows an intermediate plate according to a third embodiment in section.
- the fuel injection valve 1 is used for installation in an internal combustion engine, not shown, of a motor vehicle and is designed here as a common rail injector for the injection of preferably diesel fuel.
- the fuel injection valve comprises a nozzle module and a valve control module and is connected to an electronic control unit, also not shown here.
- the valve control module comprises a valve body 4 with a high-pressure passage 5.
- the high-pressure passage 5 communicates with a high-pressure fuel accumulator, not shown, and is filled during operation of the internal combustion engine with fuel under high pressure of up to 1.5 kg / bar.
- the nozzle module comprises a nozzle needle which is arranged and guided in a nozzle body 8 and which controls injection nozzles of the fuel injection valve 1 leading to a combustion chamber of the internal combustion engine.
- the nozzle needle At the end remote from the injection nozzles, the nozzle needle comprises a valve control piston, which is received in an axial bore in the nozzle body 8 so as to be movable back and forth.
- a high-pressure chamber 9 is formed, which partially from an intermediate pressure plate 11 is limited, which is clamped between the nozzle body 8 and the valve body 4.
- the intermediate pressure plate 11 which is also referred to as a valve plate, comprises a high-pressure passage hole 14 which passes through the intermediate pressure plate 11 and connects the high-pressure passage 5 of the valve body 4 with the high pressure space 9 of the nozzle body 8.
- the high-pressure passage hole 14 is formed by a bore having a constant diameter.
- An essential aspect of the present invention is to provide constructive possibilities for improving the quantity stability with short injection intervals.
- a cause of instability in multiple injections are pressure oscillations in the injector, which are caused on the one hand by the pressure drop during the injection and on the other hand by a pressure surge during the needle closing process.
- the associated pressure oscillations cause a change in the needle forces, which in turn lead to deviations in the injection quantity.
- the pressure oscillations can be damped by a clever design of the flow conditions in the high-pressure circuit.
- the high-pressure passage hole in the intermediate plate or valve plate is used as a damping element.
- the high-pressure passage hole is formed so as to hinder propagation of the pressure wave in the needle closing operation and to improve the flow of fuel from the high-pressure passage through the high-pressure passage hole in the high-pressure space.
- the associated direction-dependent flow coefficients allow the damping behavior to be adjusted.
- FIG. 2 shows a longitudinal section of part of a fuel injector 21, which, like the fuel injector 1 shown in FIG. 1, has a valve body 24 with a high-pressure channel 25 and a nozzle body 28 with a high-pressure chamber 29. Between the valve body 24 and the nozzle body 28, an intermediate plate 31 is clamped, which has a high pressure passage hole 34.
- the high-pressure passage hole 34 has the same diameter as the high-pressure passage 25 at the interface between the valve plate 31, which is also referred to as an intermediate plate, and the valve body 24.
- valve body 24 facing the end of the high pressure passage hole 34 has a chamfer 36 is formed.
- the valve body 24 facing the end of the high-pressure passage hole 34 may also be rounded and provided with a radius 38.
- FIG. 3 a part of an intermediate plate 41 is shown in section.
- the intermediate plate 41 has a high pressure passage hole 44 provided with a counterbore 46.
- the high-pressure passage hole 44 has a relatively small inner diameter 48 over a length 47.
- the cylinder counterbearing 46 has a significantly larger inner diameter 50 over a length 49.
- the length 49 of the cylinder depression 46 is also significantly greater than the length 47 of the high-pressure passage hole 44.
- the cylinder depression 46 and the lengths 47, 49 and the diameters 48, 50 allow the direction-dependent flow coefficients to be influenced in a targeted manner.
- FIG. 4 a part of an intermediate plate 51 is shown in section.
- the intermediate plate 51 has a high-pressure passage hole 54 formed as a cone 55.
- the cone 55 has at the interface to the valve body, not shown, a diameter 56, which is larger than a diameter 57, which is arranged at the interface to the nozzle body.
- the intermediate plate 51 has another through hole
- the damping properties can be adjusted specifically.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008540546A JP2009516796A (ja) | 2005-11-21 | 2006-10-09 | 燃料インジェクタに用いられる中間プレートおよび燃料インジェクタ |
AT06807065T ATE492721T1 (de) | 2005-11-21 | 2006-10-09 | Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor |
CN2006800435187A CN101313142B (zh) | 2005-11-21 | 2006-10-09 | 燃料喷射器用的间隔板及燃料喷射器 |
DE502006008576T DE502006008576D1 (de) | 2005-11-21 | 2006-10-09 | Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor |
EP06807065A EP1954937B1 (de) | 2005-11-21 | 2006-10-09 | Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor |
US12/093,989 US7891587B2 (en) | 2005-11-21 | 2006-10-09 | Intermediate plate for a fuel injector, and fuel injector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005055359.1 | 2005-11-21 | ||
DE102005055359A DE102005055359A1 (de) | 2005-11-21 | 2005-11-21 | Zwischenplatte für einen Kraftstoffinjektor und Kraftstoffinjektor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007057254A1 true WO2007057254A1 (de) | 2007-05-24 |
Family
ID=37696088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/067170 WO2007057254A1 (de) | 2005-11-21 | 2006-10-09 | Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor |
Country Status (8)
Country | Link |
---|---|
US (1) | US7891587B2 (de) |
EP (1) | EP1954937B1 (de) |
JP (1) | JP2009516796A (de) |
KR (1) | KR20080068873A (de) |
CN (1) | CN101313142B (de) |
AT (1) | ATE492721T1 (de) |
DE (2) | DE102005055359A1 (de) |
WO (1) | WO2007057254A1 (de) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1036932A2 (de) | 1999-03-18 | 2000-09-20 | Delphi Technologies, Inc. | Kraftstoffeinspritzventil |
DE20110130U1 (de) * | 2001-06-19 | 2002-10-24 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
DE10143511A1 (de) * | 2001-09-05 | 2003-03-27 | Siemens Ag | Speichereinspritzsystem mit Drosseleinrichtung |
EP1304475A1 (de) * | 2001-10-20 | 2003-04-23 | Robert Bosch Gmbh | Einspritzventil |
WO2003089782A2 (de) | 2002-04-19 | 2003-10-30 | Siemens Aktiengesellschaft | Injektor zur einspritzung von kraftstoff |
WO2004005704A1 (de) * | 2002-07-02 | 2004-01-15 | Siemens Aktiengesellschaft | Verfahren zum herstellen eines moduls mit einem beweglichen einsatz für ein einspritzventil und einspritzventil |
FR2845129A1 (fr) * | 2002-09-30 | 2004-04-02 | Delphi Tech Inc | Insert du type diode fluidique pour attenuer des ondes de pression, et rail commun equipe de tels inserts |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3115304A (en) * | 1961-10-11 | 1963-12-24 | Gen Motors Corp | Fuel injector pump with hydraulically controlled injection valve |
AT378242B (de) * | 1981-07-31 | 1985-07-10 | Berchtold Max Prof | Kraftstoffeinspritzanlage fuer brennkraftmaschinen, insbesondere dieselmotoren |
US4684067A (en) * | 1986-03-21 | 1987-08-04 | General Motors Corporation | Two-stage, hydraulic-assisted fuel injection nozzle |
JPH05164019A (ja) * | 1991-12-10 | 1993-06-29 | Nippon Injiekuta Kk | 燃料噴射装置 |
DE59308610D1 (de) * | 1992-12-23 | 1998-07-02 | Ganser Hydromag | Brennstoffeinspritzventil |
US5287838A (en) * | 1993-02-26 | 1994-02-22 | Caterpillar Inc. | Compact reverse flow check valve assembly for a unit fluid pump-injector |
DE4331851A1 (de) * | 1993-09-20 | 1995-03-23 | Bosch Gmbh Robert | Lochkörper und Ventil mit Lochkörper |
US6116522A (en) * | 1996-04-16 | 2000-09-12 | Motorenfabrik Hatz Gmbh & Co. Kg | Fuel injection device |
JP2000052157A (ja) * | 1998-08-04 | 2000-02-22 | Aisan Ind Co Ltd | オリフィスプレートおよびそのオリフィスプレートの噴射孔加工装置 |
DE19900037A1 (de) * | 1999-01-02 | 2000-07-06 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
US6871803B1 (en) * | 2000-06-05 | 2005-03-29 | Fujikin Incorporated | Valve with an integral orifice |
JP2002364496A (ja) * | 2001-06-06 | 2002-12-18 | Unisia Jecs Corp | フューエルインジェクタ |
DE102004012281A1 (de) * | 2003-03-14 | 2004-11-04 | Denso Corp., Kariya | Einfacher Aufbau eines Kraftstoffdruckreglers, der zum Minimieren eines Druckverlustes ausgelegt ist |
-
2005
- 2005-11-21 DE DE102005055359A patent/DE102005055359A1/de not_active Withdrawn
-
2006
- 2006-10-09 US US12/093,989 patent/US7891587B2/en not_active Expired - Fee Related
- 2006-10-09 KR KR1020087011983A patent/KR20080068873A/ko not_active Application Discontinuation
- 2006-10-09 WO PCT/EP2006/067170 patent/WO2007057254A1/de active Application Filing
- 2006-10-09 AT AT06807065T patent/ATE492721T1/de active
- 2006-10-09 JP JP2008540546A patent/JP2009516796A/ja active Pending
- 2006-10-09 EP EP06807065A patent/EP1954937B1/de not_active Not-in-force
- 2006-10-09 DE DE502006008576T patent/DE502006008576D1/de active Active
- 2006-10-09 CN CN2006800435187A patent/CN101313142B/zh not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1036932A2 (de) | 1999-03-18 | 2000-09-20 | Delphi Technologies, Inc. | Kraftstoffeinspritzventil |
DE20110130U1 (de) * | 2001-06-19 | 2002-10-24 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
DE10143511A1 (de) * | 2001-09-05 | 2003-03-27 | Siemens Ag | Speichereinspritzsystem mit Drosseleinrichtung |
EP1304475A1 (de) * | 2001-10-20 | 2003-04-23 | Robert Bosch Gmbh | Einspritzventil |
WO2003089782A2 (de) | 2002-04-19 | 2003-10-30 | Siemens Aktiengesellschaft | Injektor zur einspritzung von kraftstoff |
WO2004005704A1 (de) * | 2002-07-02 | 2004-01-15 | Siemens Aktiengesellschaft | Verfahren zum herstellen eines moduls mit einem beweglichen einsatz für ein einspritzventil und einspritzventil |
FR2845129A1 (fr) * | 2002-09-30 | 2004-04-02 | Delphi Tech Inc | Insert du type diode fluidique pour attenuer des ondes de pression, et rail commun equipe de tels inserts |
Also Published As
Publication number | Publication date |
---|---|
US7891587B2 (en) | 2011-02-22 |
KR20080068873A (ko) | 2008-07-24 |
JP2009516796A (ja) | 2009-04-23 |
US20080237373A1 (en) | 2008-10-02 |
DE102005055359A1 (de) | 2007-05-24 |
ATE492721T1 (de) | 2011-01-15 |
CN101313142A (zh) | 2008-11-26 |
CN101313142B (zh) | 2011-01-26 |
EP1954937A1 (de) | 2008-08-13 |
DE502006008576D1 (de) | 2011-02-03 |
EP1954937B1 (de) | 2010-12-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0277939B1 (de) | Kraftstoffeinspritzeinrichtung | |
EP1584813A2 (de) | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln | |
EP1034371A1 (de) | Kraftstoffeinspritzventil für eine brennkraftmaschine | |
DE102008005534A1 (de) | Kraftstoffinjektor | |
EP1797314B1 (de) | Injektor zur kraftstoffeinspritzung an einer brennkraftmaschine | |
EP1370764B1 (de) | Verfahren zum einspritzen von kraftstoff in die brennräume einer brennkraftmaschine, sowie kraftstoffeinspritzsystem für eine solche | |
DE102005060552B4 (de) | Einspritzvorrichtung für Brennstoffmotoren | |
EP1954937B1 (de) | Zwischenplatte für einen kraftstoffinjektor und kraftstoffinjektor | |
WO2008009511A1 (de) | Kraftstoffinjektor | |
EP1518050B1 (de) | Injektor für ein einspritzsystem | |
WO2000042316A1 (de) | Kraftstoffeinspritzventil für brennkraftmaschinen | |
DE102008041561B4 (de) | Kraftstoffinjektor sowie Auslegungsverfahren für einen Kraftstoffinjektor | |
EP2022975A1 (de) | Injektor | |
WO2002084109A2 (de) | Injektordüse mit drosselverhalten | |
WO2012076415A1 (de) | Düsenkörper mit konischem einspritzloch | |
WO2000032928A1 (de) | Kraftstoffeinspritzdüse für selbstzündende brennkraftmaschinen | |
EP1067284A1 (de) | Kraftstoffeinspritzventil | |
EP2439398A1 (de) | Brennstoffeinspritzventil | |
WO1987005077A1 (en) | Fuel injection nozzle for internal combustion engines | |
EP1707793A1 (de) | Hochdruckleitungssystem | |
DE102004016508A1 (de) | Common-Rail-System | |
DE10147830A1 (de) | Kraftstoffinjektor | |
DE10160490A1 (de) | Kraftstoff-Einspritzvorrichtung, Kraftstoffsystem sowie Brennkraftmaschine | |
DE102005062859A1 (de) | Kennfeldoptimierte Kraftstoffeinspritzdüse und Verfahren zu ihrer Ansteuerung | |
DE102006009071A1 (de) | Brennstoffeinspritzventil |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680043518.7 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006807065 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 12093989 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2008540546 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2505/CHENP/2008 Country of ref document: IN |
|
WWP | Wipo information: published in national office |
Ref document number: 2006807065 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087011983 Country of ref document: KR |